To change a 13 year olds diaper you would change the diaper on a 13 year old just like you would with a toddler or baby when changing their diaper.
Have the 13 year old or older kid in diapers lay down on the floor or bed or changing table and then remove their clothes if they are wearing pants or shorts.
Then undo the tapes on the diaper and then have the older kid lift their butt up in the air and pull out the old diaper from under their butt.
However first use some baby wipes to wipe their penis down and their butt even if it's just pee.
Next slide the new diaper underneath the older kids butt and sprinkle some baby powder over their genital area if you use baby powder.
Then pull the front of the diaper up between their legs and secure the diaper around the older kids waist.
The tabs of the diaper go in the back and the front of the diaper is where you secure the tabs.
Then either keep the older kid in just a diaper or put their shorts or pants back on.
You can change an older kids diaper in a park.
If the older kid needs a diaper change then it should be changed whenever and wherever they are and the park is a good place to change the diaper.
You can lay the older kid down on a blanket or towel and then change the diaper there or change the older kids diaper in a bathroom.
Yesterday I was at our local park and I saw a 7 year old boy running around the park wearing a diaper under his shorts.
He was wearing just the shorts, diaper and his shoes and I could see the waistband of the diaper.
The diaper was a Gentle Steps size 7 diaper as I could tell by the look of it when his mom took his shorts off and the fact that she brought the pack of diapers out of the car and laid the pack of Gentle Steps size 7 diapers down on a towel.
Then she had the 7 year old boy lay down on the towel and removed his shorts and then removed the wet diaper.
She then wiped him down with baby wipes and then placed the new diaper on him and pulled his shorts back up.
I was hoping she would leave his shorts off but she didn't.
I was also in my diaper sitting on the park bench and watching the boy get a diaper change and wishing it were me in that position.
The boy didn't seem to have any health issues and seemed to be enjoying his diaper and diaper change as well.